Enable RTTI for ICU....

third_party/icu/icu.gyp

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'use_system_icu%': 0,
     'icu_use_data_file_flag%': 0,
   },
   'conditions': [
@@ skipping 252 matching lines @@
               'public/i18n',
             ],
           },
           'conditions': [
             [ 'OS=="linux"', {
               # Since ICU wants to internally use its own deprecated APIs, don't
               # complain about it.
               'cflags': [
                 '-Wno-deprecated-declarations',
               ],
+              'cflags_cc': [
+                '-frtti',
+              ],
+            }],
+            ['OS == "mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+              }
+            }],
+            ['OS == "win"', {
+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'RuntimeTypeInfo': 'true',
+                },
+              }
             }],
           ],
         },
         {
           'target_name': 'icuuc',
           'type': '<(component)',
           'sources': [
             'source/common/bmpset.cpp',
             'source/common/brkeng.cpp',
             'source/common/brkiter.cpp',
@@ skipping 181 matching lines @@
                 'source/stubdata/stubdata.c',
               ],
             }],
             [ 'OS == "linux"', {
               'cflags': [
                 # Since ICU wants to internally use its own deprecated APIs,
                 # don't complain about it.
                 '-Wno-deprecated-declarations',
                 '-Wno-unused-function',
               ],
+              'cflags_cc': [
+                '-frtti',
+              ],
+            }],
+            ['OS == "mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+              }
+            }],
+            ['OS == "win"', {
+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'RuntimeTypeInfo': 'true',
+                },
+              }
             }],
           ],
         },
       ],
     }, { # use_system_icu != 0
       'targets': [
         {
           'target_name': 'system_icu',
           'type': 'settings',
           'direct_dependent_settings': {
@@ skipping 25 matching lines @@
         {
           'target_name': 'icuuc',
           'type': 'none',
           'dependencies': ['system_icu'],
           'export_dependent_settings': ['system_icu'],
         },
       ],
     }],
   ],
 }